PRODUCTIVE WELL REPAIR METHOD Russian patent published in 2005 - IPC

Abstract RU 2266386 C2

FIELD: oil production industry, particularly well repair equipment.

SUBSTANCE: device comprises a number of hollow cylindrical housings with fixing members installed thereon. Each fixing member has rams, ram holder and centralizer. Each next downstream housing is offset relative upstream one in horizontal plane for angle determined as α=120/n, where α is the angle, deg., n is number of housings with fixing members. The housings are connected one to another by threaded connection and are restricted from spontaneous detachment by screws.

EFFECT: increased engaging and retaining reliability of pipe to be fished during extraction thereof from well, reduced mounting and maintenance costs.

3 dwg

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RU 2 266 386 C2

Authors

Kustyshev A.V.

Chizhova T.I.

Kustyshev I.A.

Dates

2005-12-20—Published

2003-03-17—Filed